// Copyright 2001-2016 Crytek GmbH / Crytek Group. All rights reserved.

#include "StdAfx.h"

namespace ImageUtils
{
string OutputPath(const char* filename);
}

namespace JpgImage {

/* public domain Simple, Minimalistic JPEG writer - http://jonolick.com
 *
 * Quick Notes:
 *  Based on a javascript jpeg writer
 *  JPEG baseline (no JPEG progressive)
 *  Supports 1, 3 or 4 component input. (luminance, RGB or RGBX)
 *
 * Latest revisions:
 *	1.52 (2012-22-11) Added support for specifying Luminance, RGB, or RGBA via comp(onents) argument (1, 3 and 4 respectively).
 *	1.51 (2012-19-11) Fixed some warnings
 *	1.50 (2012-18-11) MT safe. Simplified. Optimized. Reduced memory requirements. Zero allocations. No namespace polution. Approx 340 lines code.
 *	1.10 (2012-16-11) compile fixes, added docs,
 *		changed from .h to .cpp (simpler to bootstrap), etc
 *  1.00 (2012-02-02) initial release
 *
 * Basic usage:
 *	char *foo = new char[128*128*4]; // 4 component. RGBX format, where X is unused
 *	jo_write_jpg("foo.jpg", foo, 128, 128, 4, 90); // comp can be 1, 3, or 4. Lum, RGB, or RGBX respectively.
 *
 * */

//#include <stdio.h>
//#include <stdlib.h>
//#include <math.h>

static const unsigned char s_jo_ZigZag[] = { 0, 1, 5, 6, 14, 15, 27, 28, 2, 4, 7, 13, 16, 26, 29, 42, 3, 8, 12, 17, 25, 30, 41, 43, 9, 11, 18, 24, 31, 40, 44, 53, 10, 19, 23, 32, 39, 45, 52, 54, 20, 22, 33, 38, 46, 51, 55, 60, 21, 34, 37, 47, 50, 56, 59, 61, 35, 36, 48, 49, 57, 58, 62, 63 };

struct joBufferedIO
{
	FILE* fp;
	int   size;
	char  buffer[1024];
};

static void jo_flushBuffer(joBufferedIO* io)
{
	gEnv->pCryPak->FWrite(io->buffer, io->size, io->fp);
	io->size = 0;
}

static void jo_bufferByte(joBufferedIO* io, unsigned char c)
{
	io->buffer[io->size++] = c;
	if (io->size == sizeof(io->buffer))
	{
		jo_flushBuffer(io);
	}
}

static void jo_writeBits(joBufferedIO* fp, int& bitBuf, int& bitCnt, const unsigned short* bs)
{
	ICryPak* pCryPak = gEnv->pCryPak;

	bitCnt += bs[1];
	bitBuf |= bs[0] << (24 - bitCnt);
	while (bitCnt >= 8)
	{
		unsigned char c = (bitBuf >> 16) & 255;
		jo_bufferByte(fp, c);
		if (c == 255)
		{
			c = 0;
			jo_bufferByte(fp, c);
		}
		bitBuf <<= 8;
		bitCnt -= 8;
	}
}

static void jo_DCT(float& d0, float& d1, float& d2, float& d3, float& d4, float& d5, float& d6, float& d7)
{
	float tmp0 = d0 + d7;
	float tmp7 = d0 - d7;
	float tmp1 = d1 + d6;
	float tmp6 = d1 - d6;
	float tmp2 = d2 + d5;
	float tmp5 = d2 - d5;
	float tmp3 = d3 + d4;
	float tmp4 = d3 - d4;

	// Even part
	float tmp10 = tmp0 + tmp3;  // phase 2
	float tmp13 = tmp0 - tmp3;
	float tmp11 = tmp1 + tmp2;
	float tmp12 = tmp1 - tmp2;

	d0 = tmp10 + tmp11;     // phase 3
	d4 = tmp10 - tmp11;

	float z1 = (tmp12 + tmp13) * 0.707106781f; // c4
	d2 = tmp13 + z1;                           // phase 5
	d6 = tmp13 - z1;

	// Odd part
	tmp10 = tmp4 + tmp5;    // phase 2
	tmp11 = tmp5 + tmp6;
	tmp12 = tmp6 + tmp7;

	// The rotator is modified from fig 4-8 to avoid extra negations.
	float z5 = (tmp10 - tmp12) * 0.382683433f; // c6
	float z2 = tmp10 * 0.541196100f + z5;      // c2-c6
	float z4 = tmp12 * 1.306562965f + z5;      // c2+c6
	float z3 = tmp11 * 0.707106781f;           // c4

	float z11 = tmp7 + z3;    // phase 5
	float z13 = tmp7 - z3;

	d5 = z13 + z2;      // phase 6
	d3 = z13 - z2;
	d1 = z11 + z4;
	d7 = z11 - z4;
}

static void jo_calcBits(int val, unsigned short bits[2])
{
	int tmp1 = val < 0 ? -val : val;
	val = val < 0 ? val - 1 : val;
	bits[1] = 1;
	while (tmp1 >>= 1)
	{
		++bits[1];
	}
	bits[0] = val & ((1 << bits[1]) - 1);
}

static int jo_processDU(joBufferedIO* fp, int& bitBuf, int& bitCnt, float* CDU, float* fdtbl, int DC, const unsigned short HTDC[256][2], const unsigned short HTAC[256][2])
{
	const unsigned short EOB[2] = { HTAC[0x00][0], HTAC[0x00][1] };
	const unsigned short M16zeroes[2] = { HTAC[0xF0][0], HTAC[0xF0][1] };

	// DCT rows
	for (int dataOff = 0; dataOff < 64; dataOff += 8)
	{
		jo_DCT(CDU[dataOff], CDU[dataOff + 1], CDU[dataOff + 2], CDU[dataOff + 3], CDU[dataOff + 4], CDU[dataOff + 5], CDU[dataOff + 6], CDU[dataOff + 7]);
	}
	// DCT columns
	for (int dataOff = 0; dataOff < 8; ++dataOff)
	{
		jo_DCT(CDU[dataOff], CDU[dataOff + 8], CDU[dataOff + 16], CDU[dataOff + 24], CDU[dataOff + 32], CDU[dataOff + 40], CDU[dataOff + 48], CDU[dataOff + 56]);
	}
	// Quantize/descale/zigzag the coefficients
	int DU[64];
	for (int i = 0; i < 64; ++i)
	{
		float v = CDU[i] * fdtbl[i];
		DU[s_jo_ZigZag[i]] = (int)(v < 0 ? ceilf(v - 0.5f) : floorf(v + 0.5f));
	}

	// Encode DC
	int diff = DU[0] - DC;
	if (diff == 0)
	{
		jo_writeBits(fp, bitBuf, bitCnt, HTDC[0]);
	}
	else
	{
		unsigned short bits[2];
		jo_calcBits(diff, bits);
		jo_writeBits(fp, bitBuf, bitCnt, HTDC[bits[1]]);
		jo_writeBits(fp, bitBuf, bitCnt, bits);
	}
	// Encode ACs
	int end0pos = 63;
	for (; (end0pos > 0) && (DU[end0pos] == 0); --end0pos)
	{
	}
	// end0pos = first element in reverse order !=0
	if (end0pos == 0)
	{
		jo_writeBits(fp, bitBuf, bitCnt, EOB);
		return DU[0];
	}
	for (int i = 1; i <= end0pos; ++i)
	{
		int startpos = i;
		for (; DU[i] == 0 && i <= end0pos; ++i)
		{
		}
		int nrzeroes = i - startpos;
		if (nrzeroes >= 16)
		{
			int lng = nrzeroes >> 4;
			for (int nrmarker = 1; nrmarker <= lng; ++nrmarker)
				jo_writeBits(fp, bitBuf, bitCnt, M16zeroes);
			nrzeroes &= 15;
		}
		unsigned short bits[2];
		jo_calcBits(DU[i], bits);
		jo_writeBits(fp, bitBuf, bitCnt, HTAC[(nrzeroes << 4) + bits[1]]);
		jo_writeBits(fp, bitBuf, bitCnt, bits);
	}
	if (end0pos != 63)
	{
		jo_writeBits(fp, bitBuf, bitCnt, EOB);
	}
	return DU[0];
}

bool jo_write_jpg(const char* filename, const void* data, int width, int height, int comp, int quality)
{
	// Constants that don't pollute global namespace
	static const unsigned char std_dc_luminance_nrcodes[] = { 0, 0, 1, 5, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0, 0, 0 };
	static const unsigned char std_dc_luminance_values[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
	static const unsigned char std_ac_luminance_nrcodes[] = { 0, 0, 2, 1, 3, 3, 2, 4, 3, 5, 5, 4, 4, 0, 0, 1, 0x7d };
	static const unsigned char std_ac_luminance_values[] = {
		0x01, 0x02, 0x03, 0x00, 0x04, 0x11, 0x05, 0x12, 0x21, 0x31, 0x41, 0x06, 0x13, 0x51, 0x61, 0x07, 0x22, 0x71, 0x14, 0x32, 0x81, 0x91, 0xa1, 0x08,
		0x23, 0x42, 0xb1, 0xc1, 0x15, 0x52, 0xd1, 0xf0, 0x24, 0x33, 0x62, 0x72, 0x82, 0x09, 0x0a, 0x16, 0x17, 0x18, 0x19, 0x1a, 0x25, 0x26, 0x27, 0x28,
		0x29, 0x2a, 0x34, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58, 0x59,
		0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x83, 0x84, 0x85, 0x86, 0x87, 0x88, 0x89,
		0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6,
		0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xe1, 0xe2,
		0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa
	};
	static const unsigned char std_dc_chrominance_nrcodes[] = { 0, 0, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 0, 0, 0, 0, 0 };
	static const unsigned char std_dc_chrominance_values[] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11 };
	static const unsigned char std_ac_chrominance_nrcodes[] = { 0, 0, 2, 1, 2, 4, 4, 3, 4, 7, 5, 4, 4, 0, 1, 2, 0x77 };
	static const unsigned char std_ac_chrominance_values[] = {
		0x00, 0x01, 0x02, 0x03, 0x11, 0x04, 0x05, 0x21, 0x31, 0x06, 0x12, 0x41, 0x51, 0x07, 0x61, 0x71, 0x13, 0x22, 0x32, 0x81, 0x08, 0x14, 0x42, 0x91,
		0xa1, 0xb1, 0xc1, 0x09, 0x23, 0x33, 0x52, 0xf0, 0x15, 0x62, 0x72, 0xd1, 0x0a, 0x16, 0x24, 0x34, 0xe1, 0x25, 0xf1, 0x17, 0x18, 0x19, 0x1a, 0x26,
		0x27, 0x28, 0x29, 0x2a, 0x35, 0x36, 0x37, 0x38, 0x39, 0x3a, 0x43, 0x44, 0x45, 0x46, 0x47, 0x48, 0x49, 0x4a, 0x53, 0x54, 0x55, 0x56, 0x57, 0x58,
		0x59, 0x5a, 0x63, 0x64, 0x65, 0x66, 0x67, 0x68, 0x69, 0x6a, 0x73, 0x74, 0x75, 0x76, 0x77, 0x78, 0x79, 0x7a, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
		0x88, 0x89, 0x8a, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, 0x98, 0x99, 0x9a, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xb2, 0xb3, 0xb4,
		0xb5, 0xb6, 0xb7, 0xb8, 0xb9, 0xba, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda,
		0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, 0xf8, 0xf9, 0xfa
	};
	// Huffman tables
	static const unsigned short YDC_HT[256][2] = {
		{ 0, 2 }, { 2, 3 }, { 3, 3 }, { 4, 3 }, { 5, 3 }, { 6, 3 }, { 14, 4 }, { 30, 5 }, { 62, 6 }, { 126, 7 }, { 254, 8 }, { 510, 9 }
	};
	static const unsigned short UVDC_HT[256][2] = {
		{ 0, 2 }, { 1, 2 }, { 2, 2 }, { 6, 3 }, { 14, 4 }, { 30, 5 }, { 62, 6 }, { 126, 7 }, { 254, 8 }, { 510, 9 }, { 1022, 10 }, { 2046, 11 }
	};
	static const unsigned short YAC_HT[256][2] = {
		{ 10,    4  }, { 0,     2  }, { 1,     2  }, { 4,     3  }, { 11,    4  }, { 26,    5  }, { 120,   7  }, { 248,   8  }, { 1014,  10 }, { 65410, 16 }, { 65411, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 12,    4  }, { 27,    5  }, { 121,   7  }, { 502,   9  }, { 2038,  11 }, { 65412, 16 }, { 65413, 16 }, { 65414, 16 }, { 65415, 16 }, { 65416, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 28,    5  }, { 249,   8  }, { 1015,  10 }, { 4084,  12 }, { 65417, 16 }, { 65418, 16 }, { 65419, 16 }, { 65420, 16 }, { 65421, 16 }, { 65422, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 58,    6  }, { 503,   9  }, { 4085,  12 }, { 65423, 16 }, { 65424, 16 }, { 65425, 16 }, { 65426, 16 }, { 65427, 16 }, { 65428, 16 }, { 65429, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 59,    6  }, { 1016,  10 }, { 65430, 16 }, { 65431, 16 }, { 65432, 16 }, { 65433, 16 }, { 65434, 16 }, { 65435, 16 }, { 65436, 16 }, { 65437, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 122,   7  }, { 2039,  11 }, { 65438, 16 }, { 65439, 16 }, { 65440, 16 }, { 65441, 16 }, { 65442, 16 }, { 65443, 16 }, { 65444, 16 }, { 65445, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 123,   7  }, { 4086,  12 }, { 65446, 16 }, { 65447, 16 }, { 65448, 16 }, { 65449, 16 }, { 65450, 16 }, { 65451, 16 }, { 65452, 16 }, { 65453, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 250,   8  }, { 4087,  12 }, { 65454, 16 }, { 65455, 16 }, { 65456, 16 }, { 65457, 16 }, { 65458, 16 }, { 65459, 16 }, { 65460, 16 }, { 65461, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 504,   9  }, { 32704, 15 }, { 65462, 16 }, { 65463, 16 }, { 65464, 16 }, { 65465, 16 }, { 65466, 16 }, { 65467, 16 }, { 65468, 16 }, { 65469, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 505,   9  }, { 65470, 16 }, { 65471, 16 }, { 65472, 16 }, { 65473, 16 }, { 65474, 16 }, { 65475, 16 }, { 65476, 16 }, { 65477, 16 }, { 65478, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 506,   9  }, { 65479, 16 }, { 65480, 16 }, { 65481, 16 }, { 65482, 16 }, { 65483, 16 }, { 65484, 16 }, { 65485, 16 }, { 65486, 16 }, { 65487, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 1017,  10 }, { 65488, 16 }, { 65489, 16 }, { 65490, 16 }, { 65491, 16 }, { 65492, 16 }, { 65493, 16 }, { 65494, 16 }, { 65495, 16 }, { 65496, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 1018,  10 }, { 65497, 16 }, { 65498, 16 }, { 65499, 16 }, { 65500, 16 }, { 65501, 16 }, { 65502, 16 }, { 65503, 16 }, { 65504, 16 }, { 65505, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 2040,  11 }, { 65506, 16 }, { 65507, 16 }, { 65508, 16 }, { 65509, 16 }, { 65510, 16 }, { 65511, 16 }, { 65512, 16 }, { 65513, 16 }, { 65514, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 65515, 16 }, { 65516, 16 }, { 65517, 16 }, { 65518, 16 }, { 65519, 16 }, { 65520, 16 }, { 65521, 16 }, { 65522, 16 }, { 65523, 16 }, { 65524, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 2041,  11 }, { 65525, 16 }, { 65526, 16 }, { 65527, 16 }, { 65528, 16 }, { 65529, 16 }, { 65530, 16 }, { 65531, 16 }, { 65532, 16 }, { 65533, 16 }, { 65534, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }
	};
	static const unsigned short UVAC_HT[256][2] = {
		{ 0,     2  }, { 1,     2  }, { 4,     3  }, { 10,    4  }, { 24,    5  }, { 25,    5  }, { 56,    6  }, { 120,   7  }, { 500,   9  }, { 1014,  10 }, { 4084,  12 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 11,    4  }, { 57,    6  }, { 246,   8  }, { 501,   9  }, { 2038,  11 }, { 4085,  12 }, { 65416, 16 }, { 65417, 16 }, { 65418, 16 }, { 65419, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 26,    5  }, { 247,   8  }, { 1015,  10 }, { 4086,  12 }, { 32706, 15 }, { 65420, 16 }, { 65421, 16 }, { 65422, 16 }, { 65423, 16 }, { 65424, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 27,    5  }, { 248,   8  }, { 1016,  10 }, { 4087,  12 }, { 65425, 16 }, { 65426, 16 }, { 65427, 16 }, { 65428, 16 }, { 65429, 16 }, { 65430, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 58,    6  }, { 502,   9  }, { 65431, 16 }, { 65432, 16 }, { 65433, 16 }, { 65434, 16 }, { 65435, 16 }, { 65436, 16 }, { 65437, 16 }, { 65438, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 59,    6  }, { 1017,  10 }, { 65439, 16 }, { 65440, 16 }, { 65441, 16 }, { 65442, 16 }, { 65443, 16 }, { 65444, 16 }, { 65445, 16 }, { 65446, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 121,   7  }, { 2039,  11 }, { 65447, 16 }, { 65448, 16 }, { 65449, 16 }, { 65450, 16 }, { 65451, 16 }, { 65452, 16 }, { 65453, 16 }, { 65454, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 122,   7  }, { 2040,  11 }, { 65455, 16 }, { 65456, 16 }, { 65457, 16 }, { 65458, 16 }, { 65459, 16 }, { 65460, 16 }, { 65461, 16 }, { 65462, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 249,   8  }, { 65463, 16 }, { 65464, 16 }, { 65465, 16 }, { 65466, 16 }, { 65467, 16 }, { 65468, 16 }, { 65469, 16 }, { 65470, 16 }, { 65471, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 503,   9  }, { 65472, 16 }, { 65473, 16 }, { 65474, 16 }, { 65475, 16 }, { 65476, 16 }, { 65477, 16 }, { 65478, 16 }, { 65479, 16 }, { 65480, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 504,   9  }, { 65481, 16 }, { 65482, 16 }, { 65483, 16 }, { 65484, 16 }, { 65485, 16 }, { 65486, 16 }, { 65487, 16 }, { 65488, 16 }, { 65489, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 505,   9  }, { 65490, 16 }, { 65491, 16 }, { 65492, 16 }, { 65493, 16 }, { 65494, 16 }, { 65495, 16 }, { 65496, 16 }, { 65497, 16 }, { 65498, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 506,   9  }, { 65499, 16 }, { 65500, 16 }, { 65501, 16 }, { 65502, 16 }, { 65503, 16 }, { 65504, 16 }, { 65505, 16 }, { 65506, 16 }, { 65507, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 2041,  11 }, { 65508, 16 }, { 65509, 16 }, { 65510, 16 }, { 65511, 16 }, { 65512, 16 }, { 65513, 16 }, { 65514, 16 }, { 65515, 16 }, { 65516, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 16352, 14 }, { 65517, 16 }, { 65518, 16 }, { 65519, 16 }, { 65520, 16 }, { 65521, 16 }, { 65522, 16 }, { 65523, 16 }, { 65524, 16 }, { 65525, 16 }, { 0,     0  }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 },
		{ 1018,  10 }, { 32707, 15 }, { 65526, 16 }, { 65527, 16 }, { 65528, 16 }, { 65529, 16 }, { 65530, 16 }, { 65531, 16 }, { 65532, 16 }, { 65533, 16 }, { 65534, 16 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }, { 0, 0 }
	};
	static const int YQT[] = { 16, 11, 10, 16, 24, 40, 51, 61, 12, 12, 14, 19, 26, 58, 60, 55, 14, 13, 16, 24, 40, 57, 69, 56, 14, 17, 22, 29, 51, 87, 80, 62, 18, 22, 37, 56, 68, 109, 103, 77, 24, 35, 55, 64, 81, 104, 113, 92, 49, 64, 78, 87, 103, 121, 120, 101, 72, 92, 95, 98, 112, 100, 103, 99 };
	static const int UVQT[] = { 17, 18, 24, 47, 99, 99, 99, 99, 18, 21, 26, 66, 99, 99, 99, 99, 24, 26, 56, 99, 99, 99, 99, 99, 47, 66, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99, 99 };
	static const float aasf[] = { 1.0f * 2.828427125f, 1.387039845f * 2.828427125f, 1.306562965f * 2.828427125f, 1.175875602f * 2.828427125f, 1.0f * 2.828427125f, 0.785694958f * 2.828427125f, 0.541196100f * 2.828427125f, 0.275899379f * 2.828427125f };

	if (!data || !filename || !width || !height || comp > 4 || comp < 1 || comp == 2)
	{
		return false;
	}

	ICryPak* pCryPak = gEnv->pCryPak;

	string fullPath = ImageUtils::OutputPath(filename);
	filename = fullPath.c_str();

	FILE* fp = pCryPak->FOpen(filename, "wb");
	if (!fp)
	{
		return false;
	}

	quality = quality ? quality : 90;
	quality = quality < 1 ? 1 : quality > 100 ? 100 : quality;
	quality = quality < 50 ? 5000 / quality : 200 - quality * 2;

	unsigned char YTable[64], UVTable[64];
	for (int i = 0; i < 64; ++i)
	{
		int yti = (YQT[i] * quality + 50) / 100;
		YTable[s_jo_ZigZag[i]] = yti < 1 ? 1 : yti > 255 ? 255 : yti;
		int uvti = (UVQT[i] * quality + 50) / 100;
		UVTable[s_jo_ZigZag[i]] = uvti < 1 ? 1 : uvti > 255 ? 255 : uvti;
	}

	float fdtbl_Y[64], fdtbl_UV[64];
	for (int row = 0, k = 0; row < 8; ++row)
	{
		for (int col = 0; col < 8; ++col, ++k)
		{
			fdtbl_Y[k] = 1 / (YTable[s_jo_ZigZag[k]] * aasf[row] * aasf[col]);
			fdtbl_UV[k] = 1 / (UVTable[s_jo_ZigZag[k]] * aasf[row] * aasf[col]);
		}
	}

	// Write Headers
	static const unsigned char head0[] = { 0xFF, 0xD8, 0xFF, 0xE0, 0, 0x10, 'J', 'F', 'I', 'F', 0, 1, 1, 0, 0, 1, 0, 1, 0, 0, 0xFF, 0xDB, 0, 0x84, 0 };
	pCryPak->FWrite(head0, sizeof(head0), 1, fp);
	pCryPak->FWrite(YTable, sizeof(YTable), 1, fp);
	unsigned char ch = 1;
	pCryPak->FWrite(&ch, sizeof(ch), fp);
	pCryPak->FWrite(UVTable, sizeof(UVTable), 1, fp);
	const unsigned char head1[] = {
		0xFF,                         0xC0,                           0,                           0x11,                          8,
		(unsigned char)(height >> 8), (unsigned char)(height & 0xFF), (unsigned char)(width >> 8), (unsigned char)(width & 0xFF),
		3,                            1,                              0x11,                        0,                             2,0x11,1, 3, 0x11, 1, 0xFF, 0xC4, 0x01, 0xA2, 0
	};
	pCryPak->FWrite(head1, sizeof(head1), 1, fp);
	pCryPak->FWrite(std_dc_luminance_nrcodes + 1, sizeof(std_dc_luminance_nrcodes) - 1, 1, fp);
	pCryPak->FWrite(std_dc_luminance_values, sizeof(std_dc_luminance_values), 1, fp);
	ch = 0x10;
	pCryPak->FWrite(&ch, sizeof(ch), fp); // HTYACinfo
	pCryPak->FWrite(std_ac_luminance_nrcodes + 1, sizeof(std_ac_luminance_nrcodes) - 1, 1, fp);
	pCryPak->FWrite(std_ac_luminance_values, sizeof(std_ac_luminance_values), 1, fp);
	ch = 1;
	pCryPak->FWrite(&ch, sizeof(ch), fp); // HTUDCinfo
	pCryPak->FWrite(std_dc_chrominance_nrcodes + 1, sizeof(std_dc_chrominance_nrcodes) - 1, 1, fp);
	pCryPak->FWrite(std_dc_chrominance_values, sizeof(std_dc_chrominance_values), 1, fp);
	ch = 0x11;
	pCryPak->FWrite(&ch, sizeof(ch), fp); // HTUACinfo
	pCryPak->FWrite(std_ac_chrominance_nrcodes + 1, sizeof(std_ac_chrominance_nrcodes) - 1, 1, fp);
	pCryPak->FWrite(std_ac_chrominance_values, sizeof(std_ac_chrominance_values), 1, fp);
	static const unsigned char head2[] = { 0xFF, 0xDA, 0, 0xC, 3, 1, 0, 2, 0x11, 3, 0x11, 0, 0x3F, 0 };
	pCryPak->FWrite(head2, sizeof(head2), 1, fp);

	joBufferedIO io;
	io.fp = fp;
	io.size = 0;

	// Encode 8x8 macroblocks
	const unsigned char* imageData = (const unsigned char*)data;
	int DCY = 0, DCU = 0, DCV = 0;
	int bitBuf = 0, bitCnt = 0;
	int ofsG = comp > 1 ? 1 : 0, ofsB = comp > 1 ? 2 : 0;
	for (int y = 0; y < height; y += 8)
	{
		for (int x = 0; x < width; x += 8)
		{
			float YDU[64], UDU[64], VDU[64];
			for (int row = y, pos = 0; row < y + 8; ++row)
			{
				for (int col = x; col < x + 8; ++col, ++pos)
				{
					int p = row * width * comp + col * comp;
					if (row >= height)
					{
						p -= width * comp * (row + 1 - height);
					}
					if (col >= width)
					{
						p -= comp * (col + 1 - width);
					}

					float r = imageData[p + 0], g = imageData[p + ofsG], b = imageData[p + ofsB];
					YDU[pos] = +0.29900f * r + 0.58700f * g + 0.11400f * b - 128;
					UDU[pos] = -0.16874f * r - 0.33126f * g + 0.50000f * b;
					VDU[pos] = +0.50000f * r - 0.41869f * g - 0.08131f * b;
				}
			}

			DCY = jo_processDU(&io, bitBuf, bitCnt, YDU, fdtbl_Y, DCY, YDC_HT, YAC_HT);
			DCU = jo_processDU(&io, bitBuf, bitCnt, UDU, fdtbl_UV, DCU, UVDC_HT, UVAC_HT);
			DCV = jo_processDU(&io, bitBuf, bitCnt, VDU, fdtbl_UV, DCV, UVDC_HT, UVAC_HT);
		}
	}

	// Do the bit alignment of the EOI marker
	static const unsigned short fillBits[] = { 0x7F, 7 };
	jo_writeBits(&io, bitBuf, bitCnt, fillBits);
	jo_flushBuffer(&io);

	// EOI
	ch = 0xFF;
	pCryPak->FWrite(&ch, sizeof(ch), fp);
	ch = 0xD9;
	pCryPak->FWrite(&ch, sizeof(ch), fp);

	pCryPak->FClose(fp);
	return true;
}

} // namespace JpgImage

//////////////////////////////////////////////////////////////////////////

bool WriteJPG(byte* dat, int wdt, int hgt, const char* name, int bpp, int nQuality)
{
#if CRY_PLATFORM_LINUX || CRY_PLATFORM_ANDROID || CRY_PLATFORM_APPLE
	return false;
#else
	return JpgImage::jo_write_jpg(name, dat, wdt, hgt, bpp >> 3, nQuality);
#endif
}
